QCosmeticStroker integer overflow Qt 5.12.4

[MikhailG]

Hello! Having a crash. From a users crash dump can not see much useful info, just a break on a line with an unhandled exception.
crash.dmp: 0xC0000095: Integer overflow

and the line that crashed: blend(current_span, spans, &state->penData);
current_span = 192
spans = 254
state = unavailable

Any suggestions how to fix this kind of a crash?
Thank you.

[Christian Ehrlicher]

@MikhailG said in QCosmeticStroker integer overflow Qt 5.12.4:

Any suggestions how to fix this kind of a crash?

Try to create a minimal, reproducible example and create a bug report.
And please provide the backtrace here.

[MikhailG]

@Christian-Ehrlicher said in QCosmeticStroker integer overflow Qt 5.12.4:

Try to create a minimal

It will be almost impossible. The crash is ambiguous at this point.
Backtrace is down below:

[VRonin]

can you post line 34 of charpainterproxydecorator.cpp and explain us what's happening there?

[MikhailG]

@VRonin said in QCosmeticStroker integer overflow Qt 5.12.4:

line 34 of charpainterproxydecorator.cpp

ChartPainterProxyDecorator is derived class from our custom class which has no superiors.
targetRef() - is a reference to a QPainter